Ferrous rather than ferric species are the active sites in bis(imino)pyridine iron ethylene polymerization catalysts

被引：76

作者：

Bryliakov, KP

Semikolenova, NV

Zudin, VN

Zakharov, VA

Talsi, EP

机构：

[1] Russian Acad Sci, Siberian Branch, GK Boreskov Inst Catalysis, Novosibirsk 630090, Russia

[2] Novosibirsk State Univ, Dept Nat Sci, Novosibirsk 630090, Russia

来源：

CATALYSIS COMMUNICATIONS | 2004年 / 5卷 / 01期

基金：

俄罗斯基础研究基金会;

关键词：

ethylene; iron; mechanism; polymerization; H-1; NMR; EPR;

D O I：

10.1016/j.catcom.2003.11.010

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

H-1 NMR and EPR spectroscopic studies show that the iron centers in bis(imino)pyridine iron(II) and bis(imino)pyridine iron(III) olefin polymerization pre-catalysts LFeCl2 and LFeCl3 (L=bis(imino)pyridine) are converted upon treatment with methylaluminoxane (MAO) into ferrous complexes of the type [L(Me)Fe(II)(mu-Me)(2)AlMe2] or [LFe(II)(mu-Me)(2)AlMe2](+)[Me-MAO](-). (C) 2003 Published by Elsevier B.V.

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收藏

页码：45 / 48

页数：4

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